[kaffe] sysdepCallMethod() tests galore

[Kevin D. Kissell]

> However, I only tested that on IA-64 and AMD64 so some changes may be 
> needed to accomodate other ports. Besides, I found some sort of TestNative 
> in test/regression but I couldn't test it.

There were bugs in the MIPS/Linux sysdepCallMethod that were only
caught by the TestNative regression test.  For some reason, it only gets
run if you ./configured for enable-debug (or was it disable-debug?).